Waterproof housing for spark plugs



June 6, 1933. c. HOOGENDORN WATERPROOF HOUSING FOR SPARK PLUGS 5 Sheets-Sheet 1 Filed Feb. 20, 1930 INVENTOR.

A TTORNEY.

' June 6, 19 33.

C. HOOGENDORN WATERPROOF HOUSING FOR SPARK PLUGS Filed Feb. 20, 1950 5 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

June 6, 1933. c. HOOGENDORN 1,912,930

' WATERPROOF HOUSING FOR SPARK PLUGS Filed Feb. 20, 1950 5 Sheets- Sheet s 5 as 55 g 56 INVENTOR.

By W

A TTORNEY.

I haveinvented the device shown in the aca modification p thereof;

' Figure 15 i Figure Patented June 1933 oolmnmos'nooonnnonn, or SEATILE; wssmne'ron a f' wmmreaor Zi-I OUSING For sranx PLUGS m p i a i no at on filed Februar 20,1930. semi No. 430,077.

This invention: relates to improvements in waterproof housings for spark plugs,'and has for its obJect to provide means wherehy spark plug connectionslnaybe kept free of rain Water, spray water or cloud moisture.

f A further object of theinvention is to provide means for preventing rainwater from reaching the"connections 'between a spark plug: and conductor wire in automo- W biles; boats or aeroplanes -or other places where sparkplugsare used for igniting internal combustion engines. j I

W th the alcove and such other objects in View as piayfhereinafter more fully appear,

colnpanying dis'awings in which: i F gure 1 isa-n elevational viewofa spark plug housing formed according to my in ventiony i I Figure'Q is a section o'nline 2'-2 thereof;

Figure 3' is a top plan view of a base/member;

Figure his a section on line 5 of 'Figure 3; r 1

Figure 6 is. an elevational view of a housing the coverheingremoved;

FgureQ'Tfis an enlarged detail sectional elevational view of a conductor connection; Figure 8 is a similar View; taken at right angles thereto; 1 Figure 9 is a section on line 9-9 of Figure 1; i i

FigurelO is avview similar to Figure 1 of ea Figure 11 is a vertical sectional View thereof; 3

Figure 12 1s a sectlon on line 12-- 12 1 Figure 13 is a bottom plan view of the cap of FigurelO, showlng a conductor connection attached to the spark plug nut carried bysaidfcap; a p

Q Figure 1 1 is an elevational new of 'other form of the invention; Figure 15 is a top plan view thereof; Figure 16 is a vertical sectional viewof 17 is ahorizontal section on the "upper part of Figurell;

Figure 4 is a section on 1ine;4-4&thereof;

Figure 18 is a horizontal section on the lower part of Figure 14; Figure 19 is a section, similar toFigure 16,shown removed from the spark plug; and

Figure 20 is a side elevational view ofa spark plug nut and spring clip carrying the same. w i 1 I Figure 21 is a planelevation of the spark plug nut and spring clip carrying the same. Like reference characters indicate like parts throughout the following specification, andi'n the several :views in the drawings in which: l indicates a waterproof housingtfor spark plugs Wl'llCll comprises a hollow base w; p 2, having a horizontal wall 3, with a central aperture 4, through which the screw terminal 50f the spark plug 6 projects and upon the upper end 7 of which screw the nut 8 for holding the terminal clip f the conducm3 tor wire 10 is screwed, said screw being screwed down tightly upon'the upper surface 1 11. of the wall 3. The member-2 is provided" with a reduced screw threaded extension 12,

upon which the cap 13' is screwed to efiecm) i tuallyi close the housing I. Thernember 2' is provlded with a U-shaped;aperture '14 which extends entirely through the thickened wall" 15 formingthe upper part of the housing and also through the threaded flange 12 in order to receive the U-shaped soft rubher bushing 16 fricti'onally held upon the end l'l'o'f the rubber covered conductor calblelOA Fixed totheterminal? of theicon ductor wire .10 is an oflsetflspring clip, 20 formed of a conductor metal, said inember 20 comprising a pair of spaced apart arms 21 and 22 adapted to springingly engagefaround the 9 neclr23 ofthenutS. p i i I; From the above description? it will beseen that the housing 1, is held to thespark plug: 6 by meansof the spark plug screw 5 and.

nut8 andthat due to; the cap l3iand H's-shapedbushing 16 j theinteriorozf' said: housing will; i be Water andinoisture proof the lower edge. 24 of the cap Sseati ng flat upon the hOI'lwhen surface "25* or "the member 1 l6, and; as i itis screwed down pressing out the bushing we housing 39. This' spring clip 54 with its 16 to make it tightly engage the walls 26 surrounding the aperture 14.

In Figures 10 to 18 I show a modification of the invention in which 27 is a housing having a straight cylindrical opening 28 there-through, and a cap 29 from which depends a nut 30 for the screw terminal 31 of tl1espark-..1 3lug 32.v 'Ilhe member 27 is pro-v vided with'an aperture 33 to receive the bushing 34 of the conductor 35 the clip 36 of said conductor being in line with and'engaging the neck 37 of the nut 80. The cap 29 in this case is mounted to the member 27 by means of a slip joint connectionBS between the members 27 and 29 thus permitting the member 29 to rotate upon the member 27mitil the nut 30 is drawn down suificiently tight upon the spark plug, it being understood that the clip 36 is also rotatably mounted upon the neck 370i the member 30.

' -In Figures 14 to 20 I show a further modification of the invention which consists of a housing 39 havingan integrally formed top wall 40and reduced tubular 131016Cti011 4:1

ing. In this form of the invention the soft rubber-nipple 43 mounted on the end 44 of the conductor 15 is enlargedat its outer end in for "frictional engagement with the tubular extension 41. whereby the clip 17 of the terminal id-may engage the nut &8 on the screw 10 of the spark plug 50. In this form of the invention thediameter of the housing 39 is such .as toseat;upon the nut. 51 of the: spark plug apertures being provided in' the lower edge ,53-of the member 39 as vents for anymoisture to seep through.

a spring clip 54 having right angular vertical arn1s55and 56 which are shdably mounted in the opposing vert cal grooves 57 and arms 55, and 56 seated in said grooves 57 and 58, holdsthe housing '39 in proper position upon the upper end of the spark plug.

Having described invention that which I claim to be new and desire to procure by Letters Patent is:

1; waterproof liousiir tor spark plugs comprising a shell, means for holding the shell mounted upon the upper end oi a spark plug, saidshell having an aperture and a watertight'conhection for saidaperture between a conductor terminal and the :interior not said housing,said housing having a removable cap, said cap belngscre'wthreaded I on said shell to. bind said-connection.

21A waterproofhousingfor spark plugs comprising a-shelhmeans for holding the ,;-,shellmounted upon the upper end of a spark plug, said shell having an aperture and a watertight connection for said aperture between a conductor terminal and the interior of said housing, said housing having a removable cap, said cap being screw threaded on said shell to bind said connection, said shell having a horizontal wall through which the screw ,of a spark plug projects.

3. The combination claimed in claim 2, said means comprising a nut for said screw.

4;. The-combination claimed in claim 2, said means comprising a nut for said screw, said nut being a terminal binder for said conductor to said spark plug.

5JThe combination claimed in claim 2, said meanscomprising a nut for said screw, said nut being a terminal binder for said conductor to said spark plug, said shell having a U-shapedaperture to receive said connection.

6. The combination claimed in claim 2, said means comprising a nut for said screw, said nut being a terminal binder for said conductor to said spark plug, said shell having a U-shaped aperture to receive said connection, said connection'consisting of a soft rubber bushing.

I 7. The combination claimed in claim 2, said means comprising a nut for said screw, said hut beinga terminal binder forsaid conductor to said spark plug, said shell havinga U-shaped aperture to receive said connection, said connection consisting of a soft rubber bushing, said bushing being U-shaped and having a flat side for engagement with said cap. I e v V 8. In a spark plug housing an aperture forv a conductor wire a soft rubber lu on Th s hous1ng39 may-be secured in any, p g

desired mannertothe spark plug, as for instance a'cl p or other w res. In this form ottheinventlon the nut 48 is carried by,

the terminal of the wire, and means for compressing the plug in the aperture to effectually seal the same, said housing having a removable cap, said cap formingthe means.

Intestimony whereof I aflix my signature. I

CORNELIUS HOOGENDORN. 

